I have a similar problem like the guy on this thread: https://ultimaker.com/en/community/6195-um2-feeder-motor-turn-reversal
But in my case the motor only works reversal when printing. I mean, i can change the filament fine, both removal and insert new ones, but when i going to print the motor, instead of pushing it forwards, it push it away, like trying to remove it, so no printing at all.
The printer is a brand new Ultimaker2, only printed once, the test ultimaker robot model.
After the test robot we tried to print a custom 3d model with the motor problem so we blame our design and went back to another robot, but no joy. Motor problem while printing remains. After a factory reset, problem remains too.
Any information in the issue?
As is new i'm contacting my selling retailer too.